The Influence of Cu-Coating versus Admixing on Mechanical Properties and Dimensional Change of Sintered Fe-Cu Parts

0485429 - ÚSMH 2018 CH eng C - Konferenční příspěvek (zahraniční konf.)
Strobl, S. - Wagesreither, J. - Gierl, C. - Dlapka, M. - Kupková, M. - Kupka, M. - Černý, Martin
The Influence of Cu-Coating versus Admixing on Mechanical Properties and Dimensional Change of Sintered Fe-Cu Parts.
Materials science forum. Vol. 672. Zurich: Trans. tech. publications, 2011 - (Chicinas, I.; Brandusan, L.), s. 63-67. ISBN 978-303785010-7. ISSN 0255-5476.
[International Conference on Powder Metallurgy, RoPM 2009 /4./. Craiova (RO), 08.07.2009-11.07.2009]
Výzkumný záměr: CEZ:AV0Z30460519
Klíčová slova: copper-coated iron powder * oxygen content * sintering
Obor OECD: Materials engineering

The differences in mechanical properties of pressed and sintered specimens made from mixtures of iron and copper powders or from copper-coated iron powders, produced by a cementation process, were studied. For this purpose different copper contents were used (3, 8 or 12wt%) and the oxygen content of the coated powders was measured. After sintering at 1120 degrees C for 60 minutes in hydrogen flow, microgradient structures were observed. The samples were investigated by light optical microscopy and tested under bending and tensile loads. Young's Moduli were calculated from resonance frequencies. The copper-coating of the iron powder results in an improvement of all properties, owing to a more homogeneous copper distribution and the absence of large secondary pores, compared to specimens made from mixtures of iron and copper powders. In the case of Fe-12Cu (coated), all determined properties tend to result in a maximum: highest sintered density (7,33 g/cm(3)), tensile strength (489 MPa), transverse rupture strength (1098
Trvalý link: http://hdl.handle.net/11104/0280929